. >> nuclear anxiety in japan. tonight extraordinary measures after word of of emergency. >>> 6.12 days after the 8.9 catastrophe. >>> now, as new tsunami video emerges, thousands of miles away a tour of the bay area damage and the outrage. >> this is a joke, it's sickening. >>> good evening. the official death toll from japan's earthquake and tsunami just rose tonight to at least a thousand. and if those disasters weren't bad enough, now this the government says there's probably a partial melt down going on right now at a japanese nuclear power plant. here is the source of the fear. >> reporter: this blast at a nuclear power plant is putting all of japan on edge. three reactors are having problems with their cooling function. and top government spokesman says a partial melt down is likely underway. authorities have evacuated more than 200,000 people living within a 12-mile radius of the complex. an increase of radiation in the air can increase the risk of cancer and residents are being screened for exposure. >> th